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Free calculators, converters and utilities that do one job well. No account, no clutter.
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Everyday calculators
View all →Percentage calculator
Calculate a percentage of any number instantly.
Open tool Everyday calculatorsAge calculator
Calculate your age in years, months and days from a date of birth.
Open tool Everyday calculatorsDate difference calculator
Count the days between two dates, including an optional inclusive count.
Open tool Everyday calculatorsUnit converter
Convert common length, weight, temperature, volume, speed and area units.
Open tool Everyday calculatorsDiscount calculator
See the amount saved and final price after a discount.
Open tool Everyday calculatorsBasic calculator
Evaluate arithmetic expressions with parentheses using a safe local calculator.
Open tool Everyday calculatorsScientific calculator
Calculate trigonometry, powers, roots and logarithms with a local scientific calculator.
Open toolPDF tools
View all →PDF compressor
Rewrite a PDF in your browser to remove some structural overhead.
Open tool PDF toolsPDF merger
Combine multiple PDF files into a single PDF in your browser.
Open tool PDF toolsPDF to JPG converter
Render PDF pages as JPG images locally in your browser.
Open tool PDF toolsJPG to PDF converter
Combine one or more JPG or PNG images into a PDF in your browser.
Open tool PDF toolsPDF splitter
Extract selected page numbers or ranges from a PDF into a new file.
Open tool PDF toolsPDF to PNG converter
Render each PDF page to a PNG image in your browser.
Open toolImage tools
View all →Image compressor
Reduce a JPEG or PNG image’s file size using browser canvas encoding.
Open tool Image toolsImage resizer
Resize an image to a target width and height in pixels.
Open tool Image toolsImage converter (JPG, PNG, WebP)
Convert an image between JPEG, PNG and WebP locally.
Open tool Image toolsJPG to PNG converter
Convert a JPEG image to PNG locally.
Open tool Image toolsPNG to JPG converter
Convert a PNG image to JPEG locally.
Open tool Image toolsImage to PDF converter
Create a PDF from selected JPG and PNG images.
Open toolQR codes, barcodes and links
View all →QR code generator
Generate a downloadable QR code from text or a link in your browser.
Open tool QR codes, barcodes and linksWi-Fi QR code generator
Create a QR code that helps a device join your Wi-Fi network.
Open tool QR codes, barcodes and linksURL QR code generator
Turn a website URL into a downloadable QR code.
Open tool QR codes, barcodes and linksQR code scanner
Scan a QR code using your device camera.
Open tool QR codes, barcodes and linksBarcode generator
Generate and download a Code 128 barcode from text or digits.
Open tool QR codes, barcodes and linksWhatsApp link generator
Build a click-to-chat WhatsApp link with an optional prefilled message.
Open toolText and writing utilities
View all →Word counter
Count words, paragraphs, sentences and estimated reading time.
Open tool Text and writing utilitiesCharacter counter
Count characters with and without spaces, plus lines and words.
Open tool Text and writing utilitiesText case converter
Convert text to uppercase, lowercase, title case or sentence case.
Open tool Text and writing utilitiesText-to-speech
Read text aloud using voices available in your browser and device.
Open tool Text and writing utilitiesText summarizer
Create a local extractive summary by selecting the most relevant sentences.
Open toolDeveloper and IT utilities
View all →JSON formatter & validator
Validate JSON syntax and format it with readable indentation.
Open tool Developer and IT utilitiesMy public IP address
Look up the public IP address seen by an external IP echo service.
Open tool Developer and IT utilitiesBase64 encoder & decoder
Encode text to Base64 or decode Base64 as UTF-8 text.
Open tool Developer and IT utilitiesDNS lookup
Query common DNS record types using a public DNS-over-HTTPS resolver.
Open tool Developer and IT utilitiesUnix timestamp converter
Convert between Unix timestamps and UTC date/time.
Open tool Developer and IT utilitiesColor HEX/RGB converter
Convert a HEX color value to RGB and HSL, or convert RGB channels to HEX.
Open toolNetworking and infrastructure
View all →IPv4 subnet calculator
Inspect the network address, broadcast address and host range for an IPv4 CIDR block.
Open tool Networking and infrastructurePoE power budget calculator
Estimate the total powered-device load and a planning headroom amount.
Open tool Networking and infrastructureUPS runtime estimator
Estimate battery runtime from nominal battery energy, efficiency and load.
Open tool Networking and infrastructureData transfer time calculator
Estimate transfer time for a file at a stated network speed.
Open tool Networking and infrastructureMbps to MB/s converter
Convert network speed in megabits per second to megabytes per second.
Open toolCCTV, security and ELV
View all →Electrical and engineering calculators
View all →Voltage drop estimator
Estimate voltage drop in a copper conductor using a simplified resistance model.
Open tool Electrical and engineering calculatorsOhm’s law calculator
Calculate voltage, current, resistance and power from any two known values.
Open tool Electrical and engineering calculatorsElectrical power calculator
Estimate real power from voltage, current, power factor and phase.
Open tool Electrical and engineering calculatorsSolar panel output estimator
Estimate daily and monthly solar energy from array size and peak sun hours.
Open tool Electrical and engineering calculatorsHVAC BTU estimator
Estimate a rough cooling-capacity starting point from room area and an adjustable factor.
Open tool Electrical and engineering calculatorsConcrete volume calculator
Calculate rectangular concrete volume and an optional overage allowance.
Open tool Electrical and engineering calculatorsPaint calculator
Estimate paint volume from surface area, coats and coverage.
Open tool Electrical and engineering calculatorsTile calculator
Estimate tile count and area with an optional cutting/waste allowance.
Open tool Electrical and engineering calculatorsArea and volume calculator
Calculate the area, perimeter and volume of a rectangular space.
Open toolFinance and money calculators
View all →Currency converter
Convert currencies using automatically fetched daily reference rates or your own rate.
Open tool Finance and money calculatorsLoan calculator
Estimate a fixed monthly payment and total interest for an amortizing loan.
Open tool Finance and money calculatorsMortgage calculator
Estimate principal-and-interest mortgage payments.
Open tool Finance and money calculatorsCompound interest calculator
Estimate compound growth from a starting balance, rate and compounding schedule.
Open tool Finance and money calculatorsInvestment growth calculator
Estimate investment growth with a recurring monthly contribution.
Open tool Finance and money calculatorsVAT calculator
Calculate VAT from a user-entered rate, inclusive or exclusive of tax.
Open tool Finance and money calculatorsGST calculator
Calculate GST from a user-entered rate, inclusive or exclusive of tax.
Open tool Finance and money calculatorsSales tax calculator
Calculate Sales tax from a user-entered rate, inclusive or exclusive of tax.
Open tool Finance and money calculatorsCredit card payoff calculator
Estimate payoff time and interest when making a fixed monthly payment.
Open tool Finance and money calculatorsEMI calculator
Calculate an estimated equal monthly installment for a fixed-rate loan.
Open tool Finance and money calculatorsProfit margin calculator
Calculate profit and margin from revenue and cost.
Open tool Finance and money calculatorsROI calculator
Calculate return on investment as an amount and percentage.
Open toolTime, date and productivity
View all →Time zone converter
Convert a local date and time between IANA time zones, including daylight-saving rules.
Open tool Time, date and productivityOnline timer
Start a browser-based countdown timer in seconds, minutes or hours.
Open tool Time, date and productivityWorld clock
See the current local time in major cities around the world.
Open tool Time, date and productivityOnline stopwatch
Start, pause and reset a browser stopwatch.
Open tool Time, date and productivityPomodoro timer
Run a 25-minute focus timer followed by a short break.
Open tool Time, date and productivityCountdown timer
Count down a chosen duration in seconds.
Open tool Time, date and productivityUnix timestamp converter
Convert between Unix timestamps and UTC date/time.
Open toolDesign, color and web tools
View all →Color HEX/RGB converter
Convert a HEX color to RGB and HSL values and back.
Open tool Design, color and web toolsColor picker
Pick a color visually and copy its HEX and RGB values.
Open tool Design, color and web toolsColor palette generator
Generate a coordinated light-to-dark color palette from a base HEX color.
Open tool Design, color and web toolsAspect ratio calculator
Calculate an image aspect ratio and scaled dimensions.
Open toolEveryday converters
View all →Data storage converter
Convert data sizes between decimal and binary byte units.
Open tool Everyday convertersMbps to MB/s converter
Convert network speed in megabits per second to megabytes per second.
Open tool Everyday convertersCooking measurement converter
Convert common US cooking volume measures to milliliters.
Open tool Everyday convertersCups to grams converter
Estimate grams from cups for common ingredients.
Open toolSecurity, password and random tools
View all →Secure password generator
Generate a random password locally using the browser’s cryptographic random number generator.
Open tool Security, password and random toolsRandom number generator
Generate a random integer between inclusive minimum and maximum values.
Open tool Security, password and random toolsPassword strength estimator
Estimate password length and character diversity locally without transmitting it.
Open toolAudio and video tools
View all →Lifestyle and personal utilities
View all →Fuel consumption converter
Estimate trip fuel use and cost from distance and vehicle consumption.
Open tool Lifestyle and personal utilitiesBMI calculator
Calculate body mass index from weight and height.
Open tool Lifestyle and personal utilitiesDaily calorie needs estimator
Estimate adult maintenance calories using a common resting-energy formula and activity factor.
Open tool Lifestyle and personal utilitiesPregnancy due date estimator
Estimate a due date from the first day of the last menstrual period.
Open tool Lifestyle and personal utilitiesMenstrual cycle date estimator
Estimate a next period date from the last period and typical cycle length.
Open toolGCC tools
View all →UAE VAT calculator
Add or extract VAT using an editable rate, preset to the UAE standard rate of 5%.
Open tool GCC toolsUAE gratuity estimate
Estimate a UAE private-sector end-of-service gratuity using stated basic salary and service years.
Open tool GCC toolsSaudi VAT calculator
Add or extract VAT using an editable rate, preset to Saudi Arabia’s standard rate of 15%.
Open tool GCC toolsOman VAT calculator
Add or extract VAT using an editable rate, preset to Oman’s standard rate of 5%.
Open tool GCC toolsUAE Salik toll estimator
Estimate toll spend from the number of crossings and the per-crossing rate you enter.
Open tool GCC toolsBahrain VAT calculator
Calculate VAT using a rate you verify and enter.
Open toolWriting tools
View all →Writing Tools
AI Essay Writer
Draft a structured essay from a topic and requirements, with a chosen writing level and target length.
Open tool Writing toolsEssay Rewriter
Rewrite text in a selected style while preserving its meaning and factual claims.
Open tool Writing toolsEssay Summarizer
Create a short, medium, or detailed summary of an essay or other text.
Open tool Writing toolsEssay Expander
Develop a short draft toward a selected length while keeping its original meaning and structure.
Open tool Writing toolsEssay Shortener
Remove unnecessary wording while preserving the key meaning or points.
Open tool Writing toolsGrammar Checker
Check grammar, spelling, and punctuation with a simple corrected-text result.
Open toolEmail Tools
AI Email Writer
Write a complete, natural email from your requirements, recipient, purpose and preferred tone.
Open tool Writing toolsEmail Rewriter
Rewrite an email for clarity and tone while preserving its meaning, names, dates and important details.
Open tool Writing toolsEmail Reply Generator
Draft a concise reply to an email based on what you want to say and your preferred tone.
Open tool Writing toolsProfessional Email Rewriter
Turn rough or casual text into a clear, tactful business email without unnecessary jargon.
Open tool Writing toolsEmail Subject Generator
Create five concise, relevant email subject line ideas from your email content.
Open tool Writing toolsEmail Tone Changer
Change an email to a professional, friendly, formal, polite, concise, direct, assertive or diplomatic tone.
Open toolFree to use
No registration or subscription
Private by design
Browser-based processing
Clear answers
Methods and assumptions included